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authorTejun Heo <tj@kernel.org>2009-10-14 11:18:28 +0900
committerJeff Garzik <jgarzik@redhat.com>2009-10-16 06:21:32 -0400
commit6489e3262e6b188a1a009b65e8a94b7aa17645b7 (patch)
tree6d9e13bb5a57abd06b8373fc2dced674bed152a4 /drivers/ata
parent5deab536654f95345ea11e8ec6ed5c778df348b5 (diff)
downloadop-kernel-dev-6489e3262e6b188a1a009b65e8a94b7aa17645b7.zip
op-kernel-dev-6489e3262e6b188a1a009b65e8a94b7aa17645b7.tar.gz
sata_nv: make sure link is brough up online when skipping hardreset
prereset doesn't bring link online if hardreset is about to happen and nv_hardreset() may skip if conditions are not right so softreset may be entered with non-working link status if the system firmware didn't bring it up before entering OS code which can happen during resume. This patch makes nv_hardreset() to bring up the link if it's skipping reset. This bug was reported by frodone@gmail.com in the following bug entry. http://bugzilla.kernel.org/show_bug.cgi?id=14329 Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: frodone@gmail.com Cc: stable@kernel.org Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/sata_nv.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 86a4058..1eb4e02 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -1594,9 +1594,21 @@ static int nv_hardreset(struct ata_link *link, unsigned int *class,
!ata_dev_enabled(link->device))
sata_link_hardreset(link, sata_deb_timing_hotplug, deadline,
NULL, NULL);
- else if (!(ehc->i.flags & ATA_EHI_QUIET))
- ata_link_printk(link, KERN_INFO,
- "nv: skipping hardreset on occupied port\n");
+ else {
+ const unsigned long *timing = sata_ehc_deb_timing(ehc);
+ int rc;
+
+ if (!(ehc->i.flags & ATA_EHI_QUIET))
+ ata_link_printk(link, KERN_INFO, "nv: skipping "
+ "hardreset on occupied port\n");
+
+ /* make sure the link is online */
+ rc = sata_link_resume(link, timing, deadline);
+ /* whine about phy resume failure but proceed */
+ if (rc && rc != -EOPNOTSUPP)
+ ata_link_printk(link, KERN_WARNING, "failed to resume "
+ "link (errno=%d)\n", rc);
+ }
/* device signature acquisition is unreliable */
return -EAGAIN;
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